Hormone
Pronunciation : Hor"mone (h?r"mon)
Part of Speech : n.
Definition : Defn: A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a stimulating effect; thus, according to Starling, the gastric glands are stimulated by a hormone from the pyloric mucous membrane.
[From Gr. "orma`ein to excite.] (Physiol. Chem.)
Source : Webster's Unabridged Dictionary, 1913